Power of Python Modules for Seamless Automation and Management.

Python offers various modules that can be incredibly useful for DevOps tasks. Here's an overview of some essential modules:

1. os module

   Usage: For interacting with the operating system.

   import os
       
   # Get the current working directory
   print(os.getcwd())
       
   # List files in a directory
   print(os.listdir('.'))
           

2. platform module

   Usage: Provides information about the platform.

   import platform
       
   # Get the machine architecture
   print(platform.machine())
       
   # Get the OS release version
   print(platform.release())
           

3. subprocess module

   Usage: Run external commands.

   import subprocess
       
   # Run a shell command
   subprocess.run(['ls', '-l'])
           

4. sys module

   Usage: Access system-specific parameters.

   import sys
       
   # Get command line arguments
   print(sys.argv)
       
   # Get Python version
   print(sys.version)
           

5. psutil module

   Usage: Provides an interface for retrieving system information.

   import psutil
       
   # Get CPU usage
   print(psutil.cpu_percent())
       
   # Get memory usage
   print(psutil.virtual_memory())
           

6. re (Regular Expression) module

   Usage: Pattern matching and manipulation.

   import re
       
   # Find all matches of 'devops' in a string
   text = 'DevOps is amazing, devops rocks!'
   matches = re.findall('devops', text, flags=re.IGNORECASE)
   print(matches)
           

7. scapy module

   Usage: Packet manipulation library.

   from scapy.all import *
       
   packet = IP(dst="1.2.3.4")/ICMP()
   send(packet)
           

8. Requests and urllib3 modules

   Usage: HTTP client libraries for making requests.

   import requests
       
   # Make a GET request
   response = requests.get('https://api.example.com/data')
   print(response.status_code)
           

9. logging module

   Usage: Logging messages to a file, console, etc.

   import logging
       
   logging.basicConfig(filename='example.log', level=logging.INFO)
   logging.info('This is an informational message')
           

10. getpass module

    Usage: Securely handling password prompts.

    import getpass
        
    password = getpass.getpass('Enter your password: ')
    print('Password entered:', password)
            

11. boto3 module

    Usage: AWS SDK for Python.

    import boto3
        
    s3 = boto3.resource('s3')
    for bucket in s3.buckets.all():
        print(bucket.name)
            

12. paramiko module

    Usage: SSH2 protocol library.

    import paramiko
        
    client = paramiko.SSHClient()
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    client.connect('hostname', username='user', password='pass')
        
    stdin, stdout, stderr = client.exec_command('ls -l')
    print(stdout.read().decode())
    client.close()
            

13. JSON module

    Usage: Handling JSON data.

    import json
        
    data = {'name': 'John', 'age': 30}
        
    # Serialize to JSON
    json_data = json.dumps(data)
    print(json_data)
        
    # Deserialize from JSON
    decoded_data = json.loads(json_data)
    print(decoded_data)
            

14. PyYAML module

    Usage: Handling YAML files.

    import yaml
        
    # Load YAML from a file
    with open('config.yaml', 'r') as file:
        data = yaml.safe_load(file)
        print(data)
        
    # Convert Python object to YAML
    yaml_data = yaml.dump(data)
    print(yaml_data)
            

15. pandas module

    Usage: Data manipulation and analysis.

    import pandas as pd
        
    # Read a CSV file
    data = pd.read_csv('data.csv')
        
    # Display first few rows
    print(data.head())
            

16. smtplib module

    Usage: Sending emails using SMTP.

    import smtplib
        
    # Connect to SMTP server
    server = smtplib.SMTP('smtp.example.com', 587)
    server.starttls()
    server.login('your_email@example.com', 'your_password')
        
    # Send email
    message = 'Subject: Hello\n\nThis is a test email.'
    server.sendmail('your_email@example.com', 'recipient@example.com', message)
        
    # Quit SMTP server
    server.quit()